What is CVE-2023-34237?

CVE-2023-34237 is a high-severity vulnerability in Sabnzbd, classified under Code Injection. CVSS score: 8.1/10. Published 2023-06-07.

How severe is CVE-2023-34237?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2023-34237 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Sabnzbd

CVE-2023-34237

SABnzbd is an open source automated Usenet download tool. A design flaw was discovered in SABnzbd that could allow remote code execution. Manipulating the Parameters setting in the Notification Script functionality allows code execution with the privileges of the SABnzbd process. Exploiting the vulnerabilities requires access to the web interface. Remote exploitation is possible if users[exposed their setup to the internet or other untrusted networks without setting a username/password. By default SABnzbd is only accessible from `localhost`, with no authentication required for the web interface. This issue has been patched in commits `e3a722` and `422b4f` which have been included in the 4.0.2 release. Users are advised to upgrade. Users unable to upgrade should ensure that a username and password have been set if their instance is web accessible.

Vulnerability class: RCE (Remote Code Execution)

Published 2023-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.9th percentile), scored 2026-10-08.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Sabnzbd — versions >= 1.1.0, < 4.0.2RC1

Weakness classification (CWE)

CWE-94 — Code Injection

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/sabnzbd/sabnzbd/security/advisories/GHSA-hhgh-xgh3-985r (Vendor Advisory)
github.com/sabnzbd/sabnzbd/commit/422b4fce7bfd56e95a315be0400cdfdc585df7cc (Patch)
github.com/sabnzbd/sabnzbd/commit/e3a722664819d1c7c8fab97144cc299b1c18b429 (Patch)
sabnzbd.org/wiki/configuration/4.0/general (Vendor Advisory)
security.gentoo.org/glsa/202312-11

Frequently asked questions

What is CVE-2023-34237?: CVE-2023-34237 is a high-severity vulnerability in Sabnzbd, classified under Code Injection. CVSS score: 8.1/10. Published 2023-06-07.
How severe is CVE-2023-34237?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2023-34237 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.